Failure Analysis on Tee Joint Crack of Subcritical Power Station Boiler Platen Superheater Header

Yan Ting Feng; Xiang Feng Zheng; Xue Xia Xu

doi:10.4028/www.scientific.net/AMR.538-541.1992

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 538-541Failure Analysis on Tee Joint Crack of Subcritical...

Failure Analysis on Tee Joint Crack of Subcritical Power Station Boiler Platen Superheater Header

Abstract:

Failure cause analysis was carried out on tee joint crack of boiler platen superheater header (12Cr1MoV) of subcritical power station applying microanalysis, mechanical properties test, chemical composition analysis, metallography examination and SEM observation etc. Results indicated that the tee joint crack originated at the original defects, connected with reheat cracks during propagation and led to leakage finally. The improper structure, the original welding defects, overhigh welding heat input, and excessive welding residual stress resulted in the leakage failure.

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Periodical:

Advanced Materials Research (Volumes 538-541)

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1992-1997

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.538-541.1992

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June 2012

Authors:

Yan Ting Feng, Xiang Feng Zheng, Xue Xia Xu

Keywords:

12Cr1MoV, Failure Analysis, Platen Superheater Header, Subcritical Power Station Boiler

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References

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